gofiber/fiber · error · ErrNotSupportSaveMethod

only file paths and io.Writer are supported

Error message

only file paths and io.Writer are supported

What it means

Error "only file paths and io.Writer are supported" thrown in gofiber/fiber.

Source

Thrown at client/core.go:297

// It's caller's responsibility to ensure that:
// - the channel is not closed
// - the channel is drained before returning it
// - the channel is not reused after returning it
func releaseErrChan(ch chan error) {
	errChanPool.Put(ch)
}

// newCore returns a new core object.
func newCore() *core {
	return &core{}
}

var (
	ErrTimeoutOrCancel      = errors.New("timeout or cancel")
	ErrURLFormat            = errors.New("the URL is incorrect")
	ErrNotSupportSchema     = errors.New("protocol not supported; only http or https are allowed")
	ErrFileNoName           = errors.New("the file should have a name")
	ErrBodyType             = errors.New("the body type should be []byte")
	ErrNotSupportSaveMethod = errors.New("only file paths and io.Writer are supported")
	ErrBodyTypeNotSupported = errors.New("the body type is not supported")
)

View on GitHub (pinned to 9a4c7e57fe)

When it happens

Trigger: Thrown at client/core.go:297 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of gofiber/fiber@9a4c7e57fe (2026-08-04). Data as JSON: /data/errors/dbd48676f4010e50.json. Report an issue: GitHub.